Adaptive Combat Rifle

ACR (Adaptive Combat Rifle)
ACR (Adaptive Combat Rifle)
	Bushmaster ACR in Coyote finish with an EOTech holographic sight
Type	Assault rifle (Remington ACR); Semi-automatic rifle (Bushmaster ACR)
Place of origin	United States
Service history
Used by	See Users
Wars	War in Afghanistan (2001–2021); Russo-Ukrainian War;
Production history
Designer	Magpul Industries
Designed	2006
Manufacturer	Remington Arms (military); Bushmaster Firearms International (civilian)
Produced	2010–2020
Variants	See Variants
Specifications
Mass	7.9–9.8 lb (3.6–4.4 kg)
Length	25.8 in (660 mm) (stock folded); 32.6 in (830 mm) (stock deployed); 35.5 in (900 mm) (stock extended);
Barrel length	8.25 in (210 mm) (Remington ACR); 10.5 in (270 mm); 14.5 in (370 mm) (Remington ACR); 16.5 in (420 mm); 18.5 in (470 mm);
Cartridge	5.56×45mm NATO; 6.8mm Remington SPC (Bushmaster/Remington ACR); 6.5mm Grendel (Remington ACR); 7.62×39mm (Bushmaster ACR); .450 Bushmaster (Bushmaster ACR);
Action	Gas-operated short-stroke piston, rotating bolt
Rate of fire	700 rounds/min
Muzzle velocity	5.56×45mm NATO: 2,630–3,050 ft/s (800–930 m/s); .450 Bushmaster: 1,625–2,105 ft/s (495–642 m/s);
Effective firing range	500 m (550 yd) for point target; 600 m (660 yd) for area target;
Feed system	30-round detachable STANAG magazines
Sights	Magpul MBUS and integrated Picatinny rail provided for various optical sights

The Adaptive Combat Rifle (ACR), known initially as the Masada is a modular assault rifle designed by Magpul Industries of Austin, Texas.

In late January 2008, Bushmaster Firearms International entered into a licensing agreement with Magpul whereby Bushmaster would take over production, future development, and sales of the Masada. The Magpul Masada was then known as the Bushmaster ACR. However, Remington Arms is contracted to manufacture the rifle for the U.S. military and law enforcement agencies, in which it is known as the Remington ACR. Hence, Remington Arms is responsible for the selective-fire variant of the ACR, while Bushmaster Firearms International is responsible for the semi-automatic only variant.

The Remington ACR was one of the carbines displayed to United States Army officials during an invitation-only Industry Day on November 13, 2008. The goal of the Industry Day was to review current carbine technology prior to writing formal requirements for a future replacement for the M4 carbine. The Remington ACR was also part of the Individual Carbine competition to replace the M4.